Adjustable Aircraft Type Hole Opener Circle Cutter Wood Metal Adjustable The product is shipped based on the color or size of the main image of the product page. Adjustable Aircraft Type Hole Opener Circle Cutter Wood Metal Adjustable Features: Make sure the blades are equally adjusted before drilling or else the force will be uneven. Adjust to the required size, be sure to use the hex wrench to tighten the screws. Please dont use on steel sheet or other metal. The speed of drilling must be slow, and the material of drilling does not contain iron, nails or other metal. The cutting edge is made of high-grade cemented carbide, which makes the cutting sharp and the rotation stable The aircraft type hole opener can be used for drilling holes in plastic, wood, gypsum board, plywood and other materials. It is commonly used for opening holes in speaker, spotlight, woodworking, plastic board, etc. it can be used with bench drill, drilling machine and various electric hand drills Package includes: 1 x Adjustable Hole Cutter 1 x Rounded-tip 1 x Allen Wrenc